Guns the main caliber of the American battleship “South Dakota”, the bay of Scapa Flow

Guns the main caliber of the American battleship “South Dakota” (USS South Dakota (BB-57) – 9 (in 3 gun turrets) 16-inch (406 mm) Mark 6 guns with a barrel length of 45 calibers (18.45 m). The battleship was photographed in Scapa Flow in Scotland, before leaving in August 1943 for the Pacific Ocean.